<!DOCTYPE html>
<html lang="en">
<body>
	<input name="" type="checkbox" value="Test1" checked="checked">
	<input name="" type="radio" value="Test2" checked="checked">
	<script
		src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
	<script>
		(function($) {
			$('input').removeAttr('checked');
		})(jQuery);
	</script>
</body>
</html>